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end with `Controller` - inherit from `Controller` or `ControllerBase` For straightforward action methods, it: - rewrites constructor injection from `DbContext` and repository dependencies to `I{Name}Service` - creates `Services/I{Name}Service.cs` and `Services/{Name}Service.cs` when missing - moves safe query, mapping, and business logic into the service method - preserves controller HTTP concerns such as route attributes, authorization attributes, `ActionResult` signatures, `Ok(...)`, and `NotFound()` - adds `AddScoped()` to `Program.cs` when missing The default naming uses the controller name with conservative singularization where it is obvious: - `CustomersController` -> `ICustomerService` / `CustomerService` - ambiguous names fall back to plural-safe names such as `ICustomersService` / `CustomersService` ## What It Skips The transform is intentionally conservative. It skips methods when it sees controller-only APIs or patterns that are hard to extract safely, including references to: - `HttpContext` - `ModelState` - `User` - `Request` - `Response` - `Url` It also skips more complex shapes such as async methods, methods without a clear `ActionResult` payload, and controllers that already have conflicting service files. ## Parameters - `servicesDirectory`: output directory for generated services. Default: `Services` - `controllerInclude`: comma-separated controller include globs checked inside the codemod. Default: `**/*Controller.cs` - `controllerExclude`: comma-separated controller exclude globs checked inside the codemod. Default: empty - `runAiCleanup`: whether to run the optional AI cleanup step after the AST transform. Default: `true` ## Workflow The default workflow runs in two stages: 1. A deterministic AST/JSSG step rewrites eligible controllers, generates service files, and updates `Program.cs`. 2. An optional AI step named `AI review and cleanup` reviews the resulting diff, fixes minor namespace/signature issues, and resolves conservative edge cases without unrelated rewrites. Disable the AI follow-up with: ```bash codemod workflow run -w . -t /path/to/repo --param runAiCleanup=false ``` Override the services directory or controller filters with: ```bash codemod workflow run -w . -t /path/to/repo --param servicesDirectory=Application/Services --param controllerInclude="src/**/Controllers/*.cs" --param controllerExclude="**/Generated/**" ``` ## Example Before: ```csharp [ApiController] [Route("api/[controller]")] public class CustomersController : ControllerBase { private readonly AppDbContext _db; public CustomersController(AppDbContext db) { _db = db; } [HttpGet("{id}")] public ActionResult Get(int id) { var customer = _db.Customers.Find(id); if (customer == null) return NotFound(); return Ok(new CustomerDto { Id = customer.Id, Name = customer.Name }); } } ``` After: ```csharp [ApiController] [Route("api/[controller]")] public class CustomersController : ControllerBase { private readonly ICustomerService _customerService; public CustomersController(ICustomerService customerService) { _customerService = customerService; } [HttpGet("{id}")] public ActionResult Get(int id) { var customer = _customerService.Get(id); if (customer == null) return NotFound(); return Ok(customer); } } ``` ## Development ```bash pnpm test codemod workflow validate -w workflow.yaml ``` ## License MIT 19:[["$","script",null,{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"$47"}}],["$","$L48",null,{"state":{"mutations":[],"queries":[{"state":{"data":{"json":{"id":"b8c4c836-a9c9-4f8d-976b-6c304c8178dd","name":"extract-aspnetcore-controller-services","displayName":"extract-aspnetcore-controller-services","description":"ASP.NET Core service extraction","scope":null,"visibility":"public","downloadCount":0,"executionCount":0,"createdAt":"2026-07-16 09:23:46.361731+00","updatedAt":"2026-07-16 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